1; RUN: %llc_dwarf -O0 -filetype=obj < %s | llvm-dwarfdump -debug-info - | FileCheck %s 2 3; The formal parameter 'b' for Function 'x' when inlined within 'a' is lost on 4; powerpc64 (and on x86_64 at at least -O2). Presumably this is a SelectionDAG 5; issue. 6; FIXME: arm64 is an alias for aarch64 on macs, apparently? 7; XFAIL: powerpc64, aarch64, arm64, hexagon, riscv, sparc 8 9; Build from the following source with clang -O2. 10 11; The important details are that 'x's abstract definition is first built during 12; the definition of 'b', where the parameter to 'x' is constant and so 'x's 's' 13; variable is optimized away. No abstract definition DIE for 's' is constructed. 14; Then, during 'a' emission, the abstract DbgVariable for 's' is created, but 15; the abstract DIE isn't (since the abstract definition for 'b' is already 16; built). This results in 's' inlined in 'a' being emitted with its name, line, 17; file there, rather than referencing an abstract definition. 18 19; extern int t; 20; 21; void f(int); 22; 23; inline void x(bool b) { 24; if (b) { 25; int s = t; 26; f(s); 27; } 28; f(0); 29; } 30; 31; void b() { 32; x(false); 33; } 34; 35; void a(bool u) { 36; x(u); 37; } 38 39; CHECK: [[X_DECL:.*]]: DW_TAG_subprogram 40; CHECK-NOT: DW_TAG 41; CHECK: DW_AT_name ("x") 42; CHECK-NOT: {{DW_TAG|NULL}} 43; CHECK: DW_TAG_formal_parameter 44; CHECK-NOT: DW_TAG 45; CHECK: DW_AT_name ("b") 46; CHECK-NOT: {{DW_TAG|NULL}} 47; CHECK: DW_TAG_lexical_block 48; CHECK-NOT: {{DW_TAG|NULL}} 49; CHECK: DW_TAG_variable 50; CHECK-NOT: DW_TAG 51; CHECK: DW_AT_name ("s") 52 53; CHECK: DW_TAG_subprogram 54; CHECK-NOT: DW_TAG 55; CHECK: DW_AT_name ("b") 56; CHECK-NOT: {{DW_TAG|NULL}} 57; CHECK: DW_TAG_inlined_subroutine 58; CHECK-NOT: DW_TAG 59; CHECK: DW_AT_abstract_origin {{.*}}[[X_DECL]] 60; CHECK-NOT: {{DW_TAG|NULL}} 61; CHECK: DW_TAG_formal_parameter 62; CHECK-NOT: DW_TAG 63; CHECK: DW_AT_abstract_origin {{.*}} "b" 64; Notice 'x's local variable 's' is missing. Not necessarily a bug here, 65; since it's been optimized entirely away and it should be described in 66; abstract subprogram. 67; CHECK-NOT: DW_TAG 68; CHECK: NULL 69; CHECK-NOT: DW_TAG 70; CHECK: NULL 71 72; CHECK: DW_TAG_subprogram 73; CHECK-NOT: DW_TAG 74; CHECK: DW_AT_name ("a") 75; CHECK-NOT: {{DW_TAG|NULL}} 76; CHECK: DW_TAG_formal_parameter 77; CHECK-NOT: {{DW_TAG|NULL}} 78; CHECK: DW_TAG_inlined_subroutine 79; CHECK-NOT: DW_TAG 80; CHECK: DW_AT_abstract_origin {{.*}}[[X_DECL]] 81; CHECK-NOT: {{DW_TAG|NULL}} 82; FIXME: This formal parameter goes missing at least at -O2 (& on 83; mips/powerpc), maybe before that. Perhaps SelectionDAG is to blame (and 84; fastisel succeeds). 85; CHECK: DW_TAG_formal_parameter 86; CHECK-NOT: DW_TAG 87; CHECK: DW_AT_location 88; CHECK: DW_AT_abstract_origin {{.*}} "b" 89 90; CHECK-NOT: {{DW_TAG|NULL}} 91; CHECK: DW_TAG_lexical_block 92; CHECK-NOT: {{DW_TAG|NULL}} 93; CHECK: DW_TAG_variable 94; CHECK-NOT: DW_TAG 95; CHECK: DW_AT_abstract_origin {{.*}} "s" 96 97@t = external global i32 98 99; Function Attrs: uwtable 100define void @_Z1bv() #0 !dbg !4 { 101entry: 102 tail call void @llvm.dbg.value(metadata i1 false, metadata !25, metadata !DIExpression()), !dbg !27 103 tail call void @_Z1fi(i32 0), !dbg !28 104 ret void, !dbg !29 105} 106 107; Function Attrs: uwtable 108define void @_Z1ab(i1 zeroext %u) #0 !dbg !8 { 109entry: 110 tail call void @llvm.dbg.value(metadata i1 %u, metadata !13, metadata !DIExpression()), !dbg !30 111 tail call void @llvm.dbg.value(metadata i1 %u, metadata !31, metadata !DIExpression()), !dbg !33 112 br i1 %u, label %if.then.i, label %_Z1xb.exit, !dbg !34 113 114if.then.i: ; preds = %entry 115 %0 = load i32, i32* @t, align 4, !dbg !35, !tbaa !36 116 tail call void @llvm.dbg.value(metadata i32 %0, metadata !40, metadata !DIExpression()), !dbg !35 117 tail call void @_Z1fi(i32 %0), !dbg !41 118 br label %_Z1xb.exit, !dbg !42 119 120_Z1xb.exit: ; preds = %entry, %if.then.i 121 tail call void @_Z1fi(i32 0), !dbg !43 122 ret void, !dbg !44 123} 124 125declare void @_Z1fi(i32) #1 126 127; Function Attrs: nounwind readnone 128declare void @llvm.dbg.value(metadata, metadata, metadata) #2 129 130attributes #0 = { uwtable "less-precise-fpmad"="false" "frame-pointer"="none" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" } 131attributes #1 = { "less-precise-fpmad"="false" "frame-pointer"="none" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" } 132attributes #2 = { nounwind readnone } 133 134!llvm.dbg.cu = !{!0} 135!llvm.module.flags = !{!21, !22} 136!llvm.ident = !{!23} 137 138!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, producer: "clang version 3.5.0 ", isOptimized: true, emissionKind: FullDebug, file: !1, enums: !2, retainedTypes: !2, globals: !2, imports: !2) 139!1 = !DIFile(filename: "missing-abstract-variables.cc", directory: "/tmp/dbginfo") 140!2 = !{} 141!4 = distinct !DISubprogram(name: "b", linkageName: "_Z1bv", line: 13, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: true, unit: !0, scopeLine: 13, file: !1, scope: !5, type: !6, retainedNodes: !2) 142!5 = !DIFile(filename: "missing-abstract-variables.cc", directory: "/tmp/dbginfo") 143!6 = !DISubroutineType(types: !7) 144!7 = !{null} 145!8 = distinct !DISubprogram(name: "a", linkageName: "_Z1ab", line: 17, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: true, unit: !0, scopeLine: 17, file: !1, scope: !5, type: !9, retainedNodes: !12) 146!9 = !DISubroutineType(types: !10) 147!10 = !{null, !11} 148!11 = !DIBasicType(tag: DW_TAG_base_type, name: "bool", size: 8, align: 8, encoding: DW_ATE_boolean) 149!12 = !{!13} 150!13 = !DILocalVariable(name: "u", line: 17, arg: 1, scope: !8, file: !5, type: !11) 151!14 = distinct !DISubprogram(name: "x", linkageName: "_Z1xb", line: 5, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: true, unit: !0, scopeLine: 5, file: !1, scope: !5, type: !9, retainedNodes: !15) 152!15 = !{!16, !17} 153!16 = !DILocalVariable(name: "b", line: 5, arg: 1, scope: !14, file: !5, type: !11) 154!17 = !DILocalVariable(name: "s", line: 7, scope: !18, file: !5, type: !20) 155!18 = distinct !DILexicalBlock(line: 6, column: 0, file: !1, scope: !19) 156!19 = distinct !DILexicalBlock(line: 6, column: 0, file: !1, scope: !14) 157!20 = !DIBasicType(tag: DW_TAG_base_type, name: "int", size: 32, align: 32, encoding: DW_ATE_signed) 158!21 = !{i32 2, !"Dwarf Version", i32 4} 159!22 = !{i32 2, !"Debug Info Version", i32 3} 160!23 = !{!"clang version 3.5.0 "} 161!24 = !{i1 false} 162!25 = !DILocalVariable(name: "b", line: 5, arg: 1, scope: !14, file: !5, type: !11) 163!26 = !DILocation(line: 14, scope: !4) 164!27 = !DILocation(line: 5, scope: !14, inlinedAt: !26) 165!28 = !DILocation(line: 10, scope: !14, inlinedAt: !26) 166!29 = !DILocation(line: 15, scope: !4) 167!30 = !DILocation(line: 17, scope: !8) 168!31 = !DILocalVariable(name: "b", line: 5, arg: 1, scope: !14, file: !5, type: !11) 169!32 = !DILocation(line: 18, scope: !8) 170!33 = !DILocation(line: 5, scope: !14, inlinedAt: !32) 171!34 = !DILocation(line: 6, scope: !19, inlinedAt: !32) 172!35 = !DILocation(line: 7, scope: !18, inlinedAt: !32) 173!36 = !{!37, !37, i64 0} 174!37 = !{!"int", !38, i64 0} 175!38 = !{!"omnipotent char", !39, i64 0} 176!39 = !{!"Simple C/C++ TBAA"} 177!40 = !DILocalVariable(name: "s", line: 7, scope: !18, file: !5, type: !20) 178!41 = !DILocation(line: 8, scope: !18, inlinedAt: !32) 179!42 = !DILocation(line: 9, scope: !18, inlinedAt: !32) 180!43 = !DILocation(line: 10, scope: !14, inlinedAt: !32) 181!44 = !DILocation(line: 19, scope: !8) 182